MCQ
In covalency
- AElectrons are transferred
- ✓Electrons are equally shared
- CThe electron of one atom are shared between two atoms
- DNone of the above
Example: In $CH _4$, carbon shares its four electrons with four electrons of four different $H$ - atoms to form $4$ covlent bonds. Hence covalency of carbon is $4.$
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Assertion $A$ : Energy of $2 s$ orbital of hydrogen atom is greater than that of $2\,s$ orbital of lithium.
Reason $R$ : Energies of the orbitals in the same subshell decrease with increase in the atomic number.
In the light of the above statements, choose the correct answer from the options given below.
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The correct plot for $3\, s$ orbital is